Please print your answers. 46. C.N. IX, X, & XI exit the skull via this foramen.

Question

Please print your answers. 46. C.N. IX, X, & XI exit the skull via this foramen. 47. A PSYMP impulse to lacrimal and salivary glands is a (somatic, visceral; sensory, motor) function of this Cranial Nerve. 48. Name the two ganglia associated with C.N. Vill and what information they convey to the CNS. 49. A patient who received a blow to the side of the skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eye, and the corner of his mouth droops. Which cranial nerve has been damaged? 50. What effect would cutting the vagus nerve branch that innervates the stomach have on gastric function? (you can research your answer in the textbook)

Explanation / Answer

46. They leave the skull through the Jugular Foramen.

47. A Parasympathetic impulse to the lacrimal and salivary glands is the function of X th Cranial Nerve (Vagus Nerve)

48. (a) Spiral Ganglion of the cochlea which serves for the sense of hearing. It conducts nerve impulses concerned with sound from the Organ of Corti in the cochlea.

(b) Vestibular Ganglion provides information about the position of the head to coordinate balance and Vestibulo-ocular reflex.

49.Cranial Nerve VII (Facial Nerve) is damaged.

50. If the Vagal nerves to the stomach is severed/ cut (left vagus nerve) curbs the feeling of hunger. The vagus nerve stimulates the secretion of Gastric intrinsic factor (GIF) and gastric acids which absorbs Vitamin B12. Since the vagus nerve is cut there is no secretion of GIF and in turn deficiency of Vitamin B12.

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